Replace GSON with Jackson ObjectMapper

As #319 (closed) suggests, replaced the use of GSON with Jackson ObjectMapper.

added 44 commits

• cbde93e9...ce6bfe80 - 36 commits from branch she:main
• f66d3c9e - Replaced GSON with Jackson ObjectMapper in BenchmarkStateCheckerTest
• 35bfd5c2 - Replaced GSON with Jackson ObjectMapper in Controllertest
• 087b52d6 - Replaced GSON with Jackson ObjectMapper in IOHandlerTest
• bbd42da2 - Replaced GSON with Jackson ObjectMapper in SloJson
• 71ec717b - Replaced GSON with Jackson ObjectMapper in IOHandler
• 76c518c7 - Replaced GSON with Jackson ObjectMapper in ExecutionEventHandler
• c6832515 - Replaced GSON with Jackson ObjectMapper in MetricFetcher
• 7c026335 - Removed GSON from project

Compare with previous version

marked this merge request as ready

assigned to @she

requested review from @she

added modul/theodolite label

changed milestone to %0.9.0

Looks good, I will do the rebase and then merge this MR.

changed title from Replaced GSON with Jackson ObejctMapper to Replace GSON with Jackson ObjectMapper

changed milestone to %0.10.0

added 317 commits

• 7c026335...93a3eb26 - 315 commits from branch she:main
• 96445dcb - Merge branch 'main' into Replace-GSON
• 2334aa5a - Merge branch 'main' into Replace-GSON

Compare with previous version

merged

mentioned in commit c758f507

mentioned in issue #319 (closed)